Pore Pressure Prediction of Concrete Exposed to Fire

This paper deals with concrete exposed to ISO 834 fire. Mathematical model is developed from conservation of energy,
mass for air and liquid and water vapor. The evaporation and condensation of water increases pore pressure inside the concrete is studied and discussed. Up to 12 minutes, the pore pressure wave front over take the vapor front. However, at the end of 25 minutes the situation get reversed due to increase in porosity of concrete at high temperatures. The effect of thermal conductivity and other transport properties on temperature and pore pressure histories are also analyzed.